TAMARA Ecclestone lives over the road from Kensington Palace and her 57-room mansion is definitely fit for a princess.

The 34-year-old Formula One heiress’s plush West London home boasts a solid rock crystal bath tub, private salon and giant soft play area for daughter Sophia, four – and has soared in value from an estimated £45million to £70million since Tamara bought it in 2011, thanks to two years of renovations.

Tamara chatted with journalist Josie Griffiths while they got their nails done

I’m given a taste of her glamorous life when Tamara invites Fabulous to get our nails done in her home salon, on the second storey of the six-floor mansion, which we reach via a secret jewel-encrusted lift hidden in the hallway cupboard.

And with a home this luxurious, surely she must have a favourite room.

Her massive walk-in wardrobe? Her private basement gym, which incidentally is bigger than my entire flat?

“My bedroom,” she says. “I really love our bed.

“We have a huge bed and the three of us sleep in there and also the dogs come up on the bed and we watch movies, it’s super comfy.

Tamara says the bedroom is her favourite room of the 57-room mansion - and she and her husband share their bed with their daughter, Fifi

Hollywood portraits line the black walls in the corridor, while the bathroom is also black - from the sink to the toilet and even the loo roll.

A giant wet room shower, two plush robes and Simple face wipes - one of her beauty essentials - make me feel like I'm in a luxury spa, not the downstairs loo attached to her gym.

The salon itself features a huge Hollywood dressing table, two manicure stations, two pedicures chairs, a hair station and a sunbed room – as well as a huge sparkling pink portrait of Elizabeth Taylor.

She says: “I have a sunbed in the salon which is so gross. I used to go on sunbeds, I’m so ashamed to even admit that.

“Sometimes Jay and I will sit and have a manicure and pedicure - he’s going to kill me for saying that! - but when Fifi goes to bed we’ll sit and get our nails done together.

Inside the billionaire's businesses

She told Fabulous: "I think my businesses are a great example to set for my daughter, and something that make me proud of myself.

"Show Beauty (her haircare brand) smells so amazing and has no sulphates or parabens in it.

"My favourite product in the line is the dry shampoo, it doesn’t leave any grey residue in your hair, you don’t look like a granny and let’s face it we all have way better things to do then get our hair done every day.

"I really swear by my haircare brand.

"I set up Fifi & Friends (her baby and toddler care brand) because when Fifi was born I tried so many products on her, and there was no brand I felt had everything in it.

"I wanted to create something which was vegetarian, had no nasties in it, obviously Fifi is my most precious person in my life so I wanted to be able to create something for other people’s children as well as her.

"I wanted one brand with everything together. As adults we have so much choice but I felt that wasn’t the case for kids, so that was a point of difference as well."

Tamara Ecclestone reveals she's still breastfeeding daughter Fifi, 4, the day before she begins school

The family are spending Christmas in LA, where Tamara’s sister Petra, 29, recently moved following a high profile £5.5 billion divorce from James Stunt.

She said: “It’s my sister’s 30th right before Christmas on December 19, so we’re having an 80s party for that, I’m so excited.

“We’re flying out there in the middle of December and we’ll be there until the New Year which will be nice.”

Tamara, who raised eyebrows with the massive pile of presents she gave Fifi last Christmas, has already started shipping her gifts to LA in “giant boxes”.

But when asked if she worries about Sophia growing up spoilt, she replied: “No I really feel that through watching me doing charity work and giving Christmas gifts to Great Ormond Street and asking her which toys we can give away, I think she knows she can’t take things for granted.

Tamara’s family focus is clear to see throughout her stunning home, with enormous pictures of everyone from Petra to Fifi lining her grand black staircase.

There are dozens of pictures of baby Sophia, seemingly taken on every day of her life, interspersed with sparkly Barbie portraits and Tamara’s modelling shots - but even they can't overshadow the huge glittering chandelier.

She added: “I think sometimes my dad thinks I get carried away with things like parties.

“He doesn’t like being the centre of attention and when he came to one of Fifi’s birthday parties he was like ‘your parties weren’t like this when you were a kid’.

“But I don’t think it’s so much that he disapproves, it’s just different. I’m really, really close to my dad so I would hate for him to not approve of how I live my life.”

I’m really, really close to my dad so I would hate for him to not approve of how I live my life

Tamara Ecclestone

Tamara and Petra were once seen as Britain’s answer to the Hilton sisters, regularly being papped on glamorous nights out and shopping trips in London’s Chelsea and Mayfair.

She said: “I think the assumption is that I’m some airhead party girl who’s grown up shopping and going to clubs.

“And yes that was a part of my life once upon a time but I definitely have grown up.